I find it incredibly hard to believe that since this has been a know problem and also, seemingly a potentially dangerous situation that, Spartan has not made sure this issue has been resolved.
Thankfully, I have never encountered this problem on my 2018 4362 Dutch Star. I have been over bridge approaches in Illinois that would send you off the road if I had the problem encountered by the OP.
This is a brand new coach under warranty. If itís a shock problem it should be fixed immediately at no cost to you. I would think that there would be a liability issue here for Spartan/Newmar.
Paul, Cathy and Chocolate Lab, RIO
2018 Newmar Dutch Star 4362 (Spartan)
2012 Ford F-150